DE60102668T2 - LIQUID AIR IMPROVEMENT OR INSECTICIDE COMPOSITIONS AND THEIR USE - Google Patents

Abstract

A non-aqueous, single phase, non-thickened liquid air freshener or insecticidal composition having a flashpoint of greater than about 62° C. is provided. The composition contains: a) a polar solvent; b) up to about 10 wt % of a non-polar aliphatic hydrocarbon solvent; and c) a fragrance or an insecticide. The composition may be dispensed from a device having a chamber with at least one wall made of a material which enables a vapor of the composition to diffuse out of the chamber.

Description

The The present invention relates to air freshener or insecticide compositions, in particular those coming from a container through a wall, like a Membrane, can be vaporized.

Luftverbesserer- and insecticidal compositions are known. They are used to give an environment a scent or to deodorize it or to fight insects. Such compositions are traditionally in solid form, can but now in liquid Shape, including thickened liquid Shape or gel form. The fluid is in general contained in a chamber.

The Chamber may have a wicking arrangement, so that the Composition of a wall which is in the form of a porous surface, is evaporated. In another embodiment, the chamber have at least one wall of a material suitable for the vapors of Permeable composition which allows for regulated release of vapors over a period of time becomes. Such an arrangement is described in US-A-4,534,509, wherein the perfume in an impermeable bag with a weak sealed seal along an edge which is an escape of the vapors prevented as long as the pack is closed. This is then within a larger bag from a suitable permeable Membrane included. If sufficient pressure by the user is applied, breaks the weak tight seal, and the volatile composition flows out the inner bag in the outer permeable Bag, which allows release of vapors. An arrangement in another embodiment is described in US-A-4,634,614, wherein the permeable wall with a thin one Layer of paper coated with a polymer film covered to which a protective film adheres, which is impermeable to the vapors of the composition. When subjected to a peeling force, the paper layer tears, so that the protective layer is easily removed and the volatile substance only covered by a layer of material which is permeable to the vapors, whereby a release of vapors is allowed. A similar Arrangement is described in WO 98/23304 comprising a laminate membrane with a variety of layers. The outer layers of the laminate are for the composition and its vapors impermeable and prevent the escape of vapors as long as the pack tight is closed. When opening occurs at the interface between two selected Layers of the laminate undergo a delamination, so that the Composition only by a layer of the material necessary for the vapors of the Permeable composition is covered.

In Such devices are subject to those contained in the chamber Composition strict restrictions. In particular, it must be able to be relatively constant during the Life of the device satisfactory through the wall too evaporate. The device must also be storable for a long time, without the composition the properties of the wall or other Parts of the chamber impaired. Further, the evaporation rate of the composition must be determined by the manufacturer be adjustable so that a suitable life of the device, which are generally of the order of magnitude of 45 days, can be provided. It is desirable that about after this period of time a suitable indication of the end the lifetime available is provided. This is to show the consumer when it is appropriate a new device or refill of the composition for such To buy device. Suitable display means are, for example a significant, visible reduction in the amount of the composition in the device, a color change the composition or a change in the shape of the composition, for example, from a liquid to a non-flowing gel.

In Prior art devices of the type in which a Composition always in contact with the wall of a chamber and evaporated from the chamber through this wall is a relative one small amount, for example about 3 g, of the composition present. Order for a life of about 45 days to produce a fragrance effective the composition must have a high concentration of perfume, as a result, only a small amount of solvent is available. The solvent is chosen that it is the diffusion of the perfume through the wall of the chamber supported. A non-polar solvent is generally used because such a solvent has good diffusion properties through such walls.

It is now desired to produce such devices which may contain a greater amount of liquid composition, as some consumers find advantageous. In order to obtain suitable fragrance generating or insecticidal properties under ambient conditions (ie at room temperature), it is not possible to simply increase the amount of composition present as this will increase the life of the device. This may not be desirable if a lifetime of about 45 days is required. Furthermore, a relatively constant generation of scent during the life of the device could not be achievable. In addition, and more importantly, the use of a greater amount of the composition in the chamber will increase the amount of non-polar solvent present in the chamber. It has been found that such an amount of non-polar solvent is sufficient to damage the wall during storage or use of the device, which means that the device, once opened or used for a short time, will not function properly , For example, if the wall is of the laminate membrane type, the membrane will undergo delamination.

It can not, the non-polar solvent simply by a polar solvent to replace. It is known that polar solvents are a worse Have evaporation behavior through membranes and in particular normally not through membrane walls of the air freshener or insecticide devices of the type used.

It is also desirable that a suitable advertisement for the end of life for Devices of this type is provided, so that the consumer can recognize when it is appropriate to have a new device or a refill the composition for to buy such a device. Suitable display means include the visible absence of any composition in the device one. It is therefore particularly desirable that the composition is prepared so that no residue of the solvent remains. The ad for The end of the life is then simply that of the whole solvent the composition has disappeared, i. evaporated from the device is.

We have surprisingly found a composition which is present in larger quantities in an air freshener or insecticidal device may be used which is the appropriate one Has evaporation behavior through a membrane wall and which the wall while the storage or use of the device is not destroyed or damaged.

Accordingly, presents the present invention is a non-aqueous, single-phase, non-thickened, liquid air freshener or insecticidal composition having a flashpoint of more than 62 ° C to Available, comprising:

• a) a polar solvent;
• b) up to 10% by weight of a non-polar, aliphatic Hydrocarbon-containing solvent; and
• c) a fragrance or an insecticide.

It was surprisingly found that by using a mixture of a special polar solvents and a special non-polar solvent, the evaporation behavior the composition by the manufacturer by change the relative conditions of the two components and by a suitable choice of each component easy to regulate. In particular, in the present Invention the amount of non-polar solvent in the composition not too high. Therefore, the membrane wall is not damaged or destroyed.

It is known to be the polar solvent for themselves not simply through the permeable membrane walls of the types used in air freshener and insecticide devices passes through and therefore not sufficient evaporation behavior to disposal provides. It was surprisingly found that the polar solvent when used together with the non-polar solvent will have a suitable behavior to the perfume or the To dissolve insecticide and evaporate with it and do not damage or damage the membrane wall to destroy becomes. Therefore, the use of a combination of a polar solvent and a non-polar solvent the composition with a suitable behavior for use in an air freshener or insecticide device with a wall, through which the composition diffuses, provide.

The polar solvent can be selected from a wide range of solvents, such as glycol ethers. It is desirable that the glycol ether be a (C _1-4 alkyl) glycol (C _1-4 alkyl) ether, a di (C _1-4 alkyl) glycol (C _1-4 alkyl) ether, ( C _1-4 alkyl) glycol di (C _1-4 alkyl) ether, a di (C _1-4 alkyl) glycol di (C _1-4 alkyl) ether or a tri (C _1-4 alkyl) glycol (C _1-4 alkyl) ether. The alkyl radicals may have 1, 2, 3 or 4 carbon atoms and may be, for example, methyl-ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl or t-butyl groups ,

The polar solvents For example, 3-butoxypropan-2-ol, available under the trademark Dowanol PnB, Propylene glycol monomethyl ether, available under the trademark Dowanol PM, tripropylene glycol methyl ether, available under the trademark Dowanol TPM, dipropylene glycol methyl ether, available under the trademark Dowanol DPM, Dipropylene glycol dimethyl ether, available under the trademark Proglyde DMM, dipropylene glycol n-propyl ether, available under the trademark Dowanol DPnP, dipropylene glycol mono-n-butyl ether, available under the trademark Dowanol DPnB, tripropylene glycol mono-n-butyl ether, available under the trademark Dowanol TPnB, or propylene glycol n-butyl ether, be.

One single polar solvent or a mixture of two or more polar solvents be used.

The non-polar, aliphatic hydrocarbon solvent may also be selected from a wide variety of such solvents. Examples are linear, cyclic or branched hydrocarbons. Preferred hydrocarbons are linear or branched alkanes, such as C _8-18 -alkanes, for example C _9-16 -alkanes, in particular C _9-12 -alkanes or C _11-15 -alkanes. A single non-polar solvent or a mixture of two or more non-polar solvents may be used. Often, however, a mixture of hydrocarbons is used since it is not necessary to use a single hydrocarbon and separation of various hydrocarbons is costly.

Preferred non-polar solvents are mixtures of C _9-12 and C _11-15 alkanes, such as those available under the trademarks Isopar G, Isopar H, Isopar J, Isopar K, Isopar M, Isopar L and Isopar MB, and mixtures from C _13-16 alkanes, such as those available under the Isopar P brand, and distillates available under the Isopar V brand. Other preferred non-polar solvents are aliphatic hydrocarbons available under the trademarks Norpar 12 and Norpar 15 and cycloparaffinic hydrocarbons sold under the trademarks Exxsol D60, Exxsol D80, Exxsol D100, Exxsol D220, Exxsol D230, Exxsol D100s, Exxsol D 110, Exxsol D 120 and Exxsol D 140 are available.

The Composition has a flash point of more than 62 ° C, preferably of more than 70 ° C, up. This is to ensure that the composition in the Use does not represent a fire hazard. Individual components of Composition can Flash points below these temperatures, as long as the final Composition meets this requirement. It is desirable that the flashpoint of each component is as high as possible. We have found, that is a correlation between the flashpoint of a connection and their evaporation rate with respect to n-butyl acetate. Evaporation rates can expressed on a scale be in which n-butyl acetate has an evaporation rate of 100. A higher one Value means that the compound has a higher evaporation rate and a having a lower flash point. In general, the evaporation rate is of the polar solvent preferably less than 100. The evaporation rate of non-polar, Aliphatic hydrocarbon-containing solvent is preferably less than 16.

It is desired that the composition comprises at least 15% by weight of the polar solvent, for Example 15 to 40 wt .-%, in particular 15 to 30 wt .-%, of the polar Solvent, based on the total weight of the composition. The Composition comprises less than 10% by weight of the non-polar, aliphatic hydrocarbon solvent, for example 1 to 10 wt .-%, preferably 3 to 8 wt .-%, in particular 4 to 7 wt .-%, based on the total weight of the composition. It is desirable that the weight ratio of the polar solvent to the non-polar solvent 1: 1 to 6: 1, preferably 2: 1 to 5: 1, more preferably 3: 1 to 4: 1, is. Of course, the amounts of each component and the weight ratio will be so selected that provided a composition with suitable behavior becomes.

The composition also includes a perfume, if it is to be an air freshener composition, or an insecticide, if it is to be an insecticidal composition. Fragrances for air fresheners are known in the art. Any perfume or perfume composition for air freshener that is compatible with the membrane may be used. Some fragrance compositions also contain a polar or non-polar solvent that is within the definitions set forth above, or compounds that have an air-freshening or deodorizing effect, but also act as such a solvent. Any such solvent or compound in the perfume composition added to the final composition must be taken into account in calculating the amount of polar solvent or non-polar solvent present in the final composition. It is particularly important that the total content of non-polar, aliphatic hydrocarbon solvent in the composition is less than 10 Wt .-% is. Any suitable insecticide may be used.

It is desired that the perfume is present in an amount of 50 to 80% by weight of the total composition, For example, from 60 to 75 wt .-%, is present.

The Composition may optionally include one or more components include, usually be used in the art, such as a dye or a ultraviolet light absorbing agent such as dihydroxybenzophenone, to stabilize the fragrance or the dye if necessary.

The Amount of the composition to be contained in the device can, is not limited. However, since the composition with the Membrane wall compatible is, can be a larger amount be contained in the composition of the composition than before technically possible was. For example, you can 5 g to 50 g of the composition, preferably 5 g to 20 g, more preferably about 8 to 10 g.

The The present invention also provides an air freshener or insecticidal device available, comprising a chamber having a composition as defined above contains the chamber having at least one wall of a material, it's the vapors the composition allows in to diffuse the environment in which the device is mounted is.

The Wall is permeable, allowing the fragrance or insecticide to enter the environment to diffuse. It can be made of any suitable material, for example polyethylene or paper. The wall can be another Layer which laminates on one or both of their surfaces is, for example, one made of a polymer such as polyethylene Layer or layers. The wall may be in particular those described in US-A-4,634,614 be described. In another embodiment, the wall may be the be described in WO 98/23304. In the latter document becomes a Wall in the form of a permeable polyethylene membrane described. The wall is preferably so thin that it is suitable Release rate of the composition allowed. For example, can the wall has a thickness of 20 to 100 microns, preferably 30 to 70 microns, in particular 40 to 60 μm, exhibit.

Around To prevent the device from being used perfume or insecticide, the wall may be filled with an impermeable film, which is removed before using the device, be covered. To the For example, the film may simply be peeled off the wall or otherwise removed and discarded. The foil can for example consist of a Lamiant, as with a metal, such as aluminum, laminated polyethylene, getting produced. In WO 98/23304 the impermeable film is a laminate of polyethylene and ethylene-vinyl alcohol copolymer. In another embodiment can have a number of outlet openings for disposal be placed to regulate the release of the fragrance or to allow insecticides.

The The following examples further illustrate the present invention.

example 1

compositions consisting of individual polar or non-polar solvents or a polar solvent and a non-polar solvent were tested in an air freshener device to determine their weight loss through a membrane over a period of time.

The selected solvent were the following:

Nonpolar solvent

• 1 Isopar M ^®, a mixture of C _11-15 iso-alkanes obtainable from Exxon having a flashpoint of 79 ° C and an evaporation rate of <. 1
• 2. Isopar ^® L, a mixture of C _11-15 iso-alkanes obtainable from Exxon having a flashpoint of 67 ° C and an evaporation rate of the third
• 3. Isopar P ^®, a mixture of C _13-16 iso-alkanes obtainable from Exxon having a flashpoint of 109 ° C and an evaporation rate of <. 1
• 4. Norpar ^® 12, a mixture of aliphatic hydrocarbons derived from petroleum obtainable from Exxon having a flashpoint of> 66 ° C and an evaporation rate of Figure 1.
• 5. Exxsol D60 ^®, a mixture of aliphatic cycloparaffinic hydrocarbons obtainable from Exxon having a flashpoint of 63 ° C and an evaporation rate of 2.5.
• 6. Exxsol D80 ^®, a mixture of aliphatic cycloparaffinic hydrocarbons obtainable from Exxon having a flashpoint of 75 ° C and an evaporation rate of <. 1

Polar solvents

• A. Dowanol PnB ^®, 3-butoxy propan-2-ol obtainable from Dow Chemicals having a flashpoint of 63 ° C and an evaporation rate of. 7
• B. Dowanol PM ^®, propylene glycol monomethyl ether, available from Dow Chencals, having a flash point of 31 ° C and an evaporation rate of 70th
• C. Dowanol DPM ^®, dipropylene glycol methyl ether, available from Dow Chemicals, having a flash point of 75 ° C and an evaporation rate of the third
• D. Proglyde DMM ^®, dipropylene glycol dimethyl ether, available from Dow Chemicals, having a flash point of 65 ° C and an evaporation rate of 80 s.

The above evaporation rates are based on n-butyl acetate having an evaporation rate of 100; the figure for Proglyde DMM ^® was calculated as the molecular weight x vapor pressure (mm Hg at 20 ° C). A high flash point generally gives a low evaporation rate.

The above solvent were individually or as a combination in weight ratios used by 75:25, 50:50 and 25:75. 8 g of each of the compositions was in heat-affected Reservoirs with a linear high-pressure polyethylene laminate membrane and aluminum, as described in WO 98/23304, on one side thereof tightly enclosed. The devices were removed by peeling off the Aluminum laminate layer activated to expose the membrane. The Devices were stored at ambient conditions and the weight loss monitored over 15 days.

The The following table shows the percentage weight loss over the Time.

It it can be seen that the weight loss by choosing appropriate solvent and by choosing appropriate conditions the two solvents can be regulated.

Example 2

A fragrance-containing composition was prepared to provide a composition for use in a membrane / liquid reservoir system having a 9 g fill weight. Exxsol D60 ^® 6% Proglyde DMM ^® 24% Citrus fragrance 68% 2,4-dihydroxybenzophenone 2% (UV-absorber)

Of the Perfume contained some polar solvent, namely 0.3% Dipropylene glycol, 9.2% butoxypropanol and 0.9% triethyl citrate. The Composition was in the same device as in example 1 used, tightly packed, except that the membrane thickness of 60 μm to 40 microns was reduced.

Claims (10)

Non-aqueous, single-phase, non-thickened, liquid Air freshener or insecticide composition having a flash point of more than 62 ° C, full: a) a polar solvent; b) up to 10% by weight of a non-polar, aliphatic hydrocarbon containing solvent; and c) a perfume or an insecticide. A composition according to claim 1, which is an air freshener composition represents and comprises a perfume. A composition according to claim 1 or 2, in which the polar solvent is an evaporation rate of less than 100 and the non-polar solvent has an evaporation rate of less than 16, based on a scale on which n-butyl acetate has an evaporation rate of 100. A composition according to any one of the preceding claims, wherein the polar solvent a glycol ether. A composition according to claim 4 wherein the polar solvent is a (C _1-4 alkyl) glycol (C _1-4 alkyl) ether, a di (C _1-4 alkyl) glycol (C _1-4 alkyl) ether, a (C _{1- 4} alkyl) glycol di (C _1-4 alkyl) ether, a di (C _1-4 alkyl) glycol di (C _1-4 alkyl) ether or tri (C _1-4 alkyl ) is glycol (C _1-4 alkyl) ether. A composition according to claim 4 wherein the polar solvent 3-butoxy propan-2-ol, Propylene glycol monomethyl ether, tripropylene glycol methyl ether, dipropylene glycol methyl ether, Dipropylene glycol dimethyl ether, dipropylene glycol n-propyl ether, dipropylene glycol mono n-butyl ether, Tripropylene glycol mono-n-butyl ether or propylene glycol n-butyl ether. A composition according to any one of the preceding claims, wherein the non-polar solvent is a C _10-18 alkane or a cycloparaffinic hydrocarbon. Composition according to any one of the preceding claims, in which the weight ratio of the polar solvent to the non-polar solvent 1: 1 to 6: 1. A composition according to claim 8, wherein the ratio is 2: 1 to 5: 1. An air freshener or insecticide device comprising a chamber having a composition as in any of the preceding claims defined, contains, the chamber having at least one wall of a material, it's the vapors the composition allows to diffuse into the environment in which the device is mounted is, wherein the wall is preferably made of polyethylene and optionally one Thickness of 20 to 100 microns having.